Merge pull request #25092 from klatism:libjpeg-upgrade

libjpeg upgrade to version 9f #25092

Upgrade libjpeg dependency from version 9d to 9f.

- [X] I agree to contribute to the project under Apache 2 License.
- [X] To the best of my knowledge, the proposed patch is not based on a code under GPL or another license that is incompatible with OpenCV
- [X] The PR is proposed to the proper branch
- [ ] There is a reference to the original bug report and related work
- [ ] There is accuracy test, performance test and test data in opencv_extra repository, if applicable
      Patch to opencv_extra has the same branch name.
- [ ] The feature is well documented and sample code can be built with the project CMake

modules/video/test/test_trackers.cpp

@@ -166,7 +166,9 @@ TEST(vittrack, accuracy_vittrack)
     cv::TrackerVit::Params params;
     params.net = model;
     cv::Ptr<Tracker> tracker = TrackerVit::create(params);
-    checkTrackingAccuracy(tracker, 0.67);
+    // NOTE: Test threshold was reduced from 0.67 (libjpeg-turbo) to 0.66 (libjpeg 9f),
+    // becase libjpeg and libjpeg-turbo produce slightly different images
+    checkTrackingAccuracy(tracker, 0.66);
 }
 
 }}  // namespace opencv_test::